Oculomotor function at low temperature: antarctic versus temperate fish
نویسندگان
چکیده
منابع مشابه
Antarctic fish hemoglobins: evidence for adaptive evolution at subzero temperature.
Notothenioids represent a large group of marine teleosts that are mostly endemic to the Antarctic Ocean. In this environment, the low metabolic demand and the high oxygen concentration reduce the need for hemoglobin(s) [Hb(s)]. The extreme condition is represented by the icefish (Channichthyidae, Notothenioidei), the only vertebrates that lack Hb. We obtained the nucleotide sequence coding for ...
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Seasonal acclimation versus permanent adaptation to low temperatures leads to a differential response in the expression of cytochrome- c oxidase (CCO) in temperate and Antarctic eelpouts. Although eurythermal eelpout from the North Sea ( Zoarces viviparus) displayed a cold-induced rise of CCO activity in white muscle, enzyme activity in the cold stenothermal Antarctic eelpout Pachycara brachyce...
متن کاملHigh-energy turnover at low temperatures: recovery from exhaustive exercise in Antarctic and temperate eelpouts.
Earlier work on Notothenioids led to the hypothesis that a reduced glycolytic capacity is a general adaptation to low temperatures in Antarctic fish. In our study this hypothesis was reinvestigated by comparing changes in the metabolic status of the white musculature in two related zoarcid species, the stenothermal Antarctic eelpout Pachycara brachycephalum and the eurythermal Zoarces viviparus...
متن کاملAssisted protein folding at low temperature: evolutionary adaptation of the Antarctic fish chaperonin CCT and its client proteins
Eukaryotic ectotherms of the Southern Ocean face energetic challenges to protein folding assisted by the cytosolic chaperonin CCT. We hypothesize that CCT and its client proteins (CPs) have co-evolved molecular adaptations that facilitate CCT-CP interaction and the ATP-driven folding cycle at low temperature. To test this hypothesis, we compared the functional and structural properties of CCT-C...
متن کاملRecD plays an essential function during growth at low temperature in the antarctic bacterium Pseudomonas syringae Lz4W.
The Antarctic psychrotrophic bacterium Pseudomonas syringae Lz4W has been used as a model system to identify genes that are required for growth at low temperature. Transposon mutagenesis was carried out to isolate mutant(s) of the bacterium that are defective for growth at 4 degrees but normal at 22 degrees . In one such cold-sensitive mutant (CS1), the transposon-disrupted gene was identified ...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 1985
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.117.1.181